You can try this, but the expertise is on their site, not here
> "With your free Acrobat.com account you can convert up to five files total to PDF. If you need more Adobe PDF file conversions, we recommend you upgrade to an Acrobat.com Premium account. To get the full power of PDF creation on your desktop, purchase Adobe Acrobat® 9 software.
What file formats can I convert to Adobe PDF?
You can convert the following file types: text (TXT, PS, RTF), Microsoft Office (DOC, XLS, PPT, PRJ), OpenOffice (ODT, ODP, ODS, ODG, ODF), StarOffice (SWX, SXI, SXC, SXD, STW), WordPerfect (WPD), and image files (BMP, GIF, JPEG
, TIFF, PNG)..."